Fishing tool



B. M. JENSEN May 13, 1930.

2 Sheets-Sheet 1 FISHING TOOL Filed Oct. 24, 1927 B. M. JENSEN FISHINGTOOL May 13, 1930.

Filed OGL. 24. 1927 fla-l5 U l2 Sheets-Sheet 2 rif V 1Q toA preventrotat-1on,lsuch as being squared. s Fig. 2 1s a vertical section takensubstan- Patented May 13, 1930 'j 'I Unai-irse, stares raiser @essi-c,l:

FISHNG T0013VV Application led. October 24, 1927. Serial No. 228,267.

My invention is a fishing tool for deep chamber. This latter-pipe isinteriorly conwell work. nected to a foot member which hasr an An objectof my invention is the introducinternally threaded socket in which itstion of the gripping elements ot the fishing a shoe; plug, this beingthreaded therein, 5'- tool intoawellin the collapsed position, and, theshoe plug having jaws pivotally con* 5K5 in addition, ahydraulicallyoperatedarrange nected thereto. The shoe plug and foot mentfor spreading said elements apart, due havea longitudinal passageway inalignment to the act-ion of a slushing fluid, such iiuid and a pipe'isconnected on the upper end of' being discharged around the grippingelethe' shoe sliding in thejpassage in the foot. l0'ments,maintainingthem clean and washing4 A valve is slidably mounted inkthis latter 60 the mud, and thelike, away from the fish to pipe. y Ybelifted. Theivalve comprises'aivalve casing with Another obj ect or" myinvention is collapsports at the top and bottoni', and a valve plug, ingthe gripping elements by a rotary action closing the upper port. Thevalve plug is, 1510iE theh fishing tool,r and when the fish' iscennected:l Abyaspringto the upper: end of, 55 gripped,A the jaws orgripping elementsbeing the pipe, which extends throughthe passage heldfirmly in engagementr with the fish and in the foot, such pipebeingslidable in the` lifting, same to the top of the well. foot. A rodextends, from: the lower end of l A more particular object of myinvent-ion the valve casing and is connected` by toggle is adifferential type of action in spreading levers at its lower end to thepivotally 70 the jaws or gripping elements, whereby the mounted jaws,and is utilized by forcing initial hydraulic pressure spreads the jawsslushing fluid` through the carrier pipev into apart after introductioninto the well,A and the pipe forming the compression chamber. a.lfurther increase. of pressure passes the This, operates against thevalve casing and slnshingtluid outwardly through the lower bodily movesthecasi-ng until the valve plug end'of the'fshing tool; j is opened,whenthe casing remains in its Another object orlr my invention isprovidlowered position and'wit-h the jaws spread ing4 a telescopicsupport for the iishing tool apart, these jaws being contracted inlowerso that the weight of the rods and the like, ing the shing toolinto the well. 3i?" leading from the tool to the top ot' the well, Toclose thejaws a sleeve is connected to a 80 will not bear on the jaws,but pipe inserts rotatable collar operating between a fixed may beutilized to give a sufficient weight on abutment. collar and. the toot.The operation the jaws it desired. ot rotating slushing fluid pipescauses the A further object of my invention is hav-` relative rotationof .the foot and the shoe, ing a ball bearing joint between the tootelethe jaws on :the shoe being in engagement S5 ment of theV tool havingthe jaws connected with the iish,rand forces the sleeve downthereto, andthe upper part of' the tool, to wardly,.thereby contracting the jawsand' allow action of a sleeve in squeezing in the grippingthe ish forremoval to the surface jaws on the turning movement of the upper of a well. Y part ot the fishing tool. l My invention will be more readilyunder- In constructing my invention I have a stood from the followingdescription and series of pipes connected from the top of thedrawings,rin which: l welll.v These terminate in a telescopic cou-Figure 1 is a side elevation of my ishing pling, the, inner member ofwhich is shaped` tool.

Thisl inner part is connected by a coupling tially on the line 2-'2 ofFig.` l in the direc-Y to inserted pipes which may be utilized to tionof the arrows, certain oit the interior give weight, and theseppipesconnect into a parts beingV shownV in elevation and illusj couplingwhich is attached to a relatively trating the jaws in their collapsedposition f' i large pipe, forming a compression iiuid for lowering intothe well. 100

Fig. 3 is a View similar to Fig. 2 showing certain of the upper parts inelevation and with the jawsy expanded.

Fig. 4 is a vertical detail` on the line 4 4 .of Fig. 2 in the directionof' the arrows, showing the'pivotal mounting of the jaws.

Fig. 5 is a sectional view similar to Figs. 2 and 3 with certain of theupper parts 1n j elevation showing a fish gripped by the jaws.

\ the jaws contracted.

` Referring first to the construction of Figs. 1 through 7, Vtheslushing fluid pipes are indicated by the numeral 11, these beingutilized tov lower the fishing tool into a well, suchV slushing pipesbeing supported for rotation in the ordinary manner. The lower end of'these pipes is connected to alcoupling 12 and this coupling is connectedto a telescopic coupling designated generally by the numeral 13, thislatter coupling having an outer cylindrical member 14 with a cap 15 atthe top connected to the coupling 12 and shoulders 16 Vat the bottom.The inner telescopic member 17 has a head18 with a packing 19 prevent-VingV leakage betweenthe shank 2() and the passage through the shoulder16.v This shank is made square, and it terminates in a pin 21 Y whichisconnected to a box 22. Below the box there is inserted pipe sections 23which may be of the number or weight desired to give a sufficient weighton the tool. y

A coupling 24 connects to a pipe 25 which forms a compression fluidchamber 26. This pipe is interiorly connected to the threaded upperend'27 of a foot 28, andimmediately below theend of the pipe 25 there isa square holed collar 29. The foot has a cylindrical section witharotatable collar 31 fitted thereon, there being ball bearings 32 betweenthe collar 29 fixed on a squared upper end of the foot andthe rotatablevcollar 31. There is also a second set of ball bearings 33 between theinternal coupling end 34 of the rotatable collar and the main portion ofthe body of the foot 28.

The foot 28 has an interiorly threaded socket 35 and has a longitudinalpassage 36 extending vertically through the body of the foot to thecompression fluid chamber 26.` A shoe plug 37 isexteriorly threaded andadapted to screw to the threads of the socket 35. Extending upwardlyfrom this shoe plug there is a pipe'38 which has a slidable lit inthepassage 36 4and extends above said passage having an abutment collar39 secured to the top and limiting the downward movement of the shoeplug by engagement with the threaded upper end of the foot.

A shoe 40 is connected to the shoe plug by an internal fitting 41, andthis plug has a series of slots 42 with sockets 43 formed at the top.There is an internal passage 44 through the shoe plug and in alignmenttherewith an internal passage 45 through the shoe.

A plurality of jaws 46, of which four are indicated, have balls 47 attheir upper ends, and downwardly from these balls there are Shanks 48which have a transverse movement in the slots 42. The jaws have anoutwardly bowed section 49 and gripping ends 50. Attached to each of theaws thereis a lug 51 and toggle links or levers 52 are pivotallyconnected to these lugs, the inner ends of the toggle links beingconnected to a ring 53.

A valve casing 54 is slidably mounted in the pipe 38 (note particularlyFig. 6). The valve casing has an internally attached head 55 with alport 56 therethrough and a valve seat 57 on the inner part of the head.The base 58 of the valve casing has a rod 59 lconnected thereto, suchrod being attached to the ring 53. There are ports 6) through the baseof the valve casing. A valve plug 61 has a conical face to seat on thevalve seat 57 and isprovided with a stem 62 with ahead 63, to which isattached a spring 64, the upper end of the spring being connected to apin 65, or the like, attached to theabutment collar 39.

Acylindrical sleeve 66 is secured by an internal screw-threadedconnection 67 f to the lower part 34 of the rotatable collar 31. Thissleeve has a turning fit on the foot 28 and on the shoe 40, but does notcontact lwith the lower part of the shoe plug.Y The interior lower endof the sleeve engages the outer surface of the bowed sections of thejaws 49, as

VVindicated in Fig. 5.

The manner of operation and functioning of my fishing tool, as abovedescribed, is substantially as follows:

In the normal condition of lowering the fishing tool into the well, thetelescopic coupling is fully extended, that is, with the innertelescopic member 17 lowered in the upper member 14 to its full extent,and the weight of the tool being carried on the shoulder 16. The tool islowered into the well with the shoe plug 37 screwed out of the socket 35to a considerable extent, as illustrated in Fig. 2, and with the sleeve66 in an upper position on the shoe 40. The spring 64 exerts an lupwardpull on the valve casing 54 and through the medium of the rod 59 drawsupwardly on the toggle links or levers 52,

hence pulling the j awsinto the collapsed position, as shown in Fig. 2.

` WVhenthe fishing Vtool is introduced into the well and touches thebottom, the supporting pipes are lowered slightly relative to the lowerend of the tool so that the telescopic coupling is somewhat contracted,as shown in Fig. 3. This takes the weight of all the supporting rods orpipes off the jaws. It is intended when the jaws reach the bottom of thewell that a slushing fluid be forced f down through the supportingpipes, fiowing into the compression fluid chamber 26, and from thispassing down the pipe 38. The ini* tial action of the slushing liuid isto bodily move the valve casing 54 downwardly, and in such action therod 59 is lshifted down and causes the spreading of the toggle links 52,and thus expands the jaws into the position shown in Fig. 3. j

When the jaws are fully expanded, the pressure of the slushing fluidshifts the valve plug 61 downwardly away from the seat 57, allowingpassage of slushing fluid through the inlet port 56 into the valvecasing 54, and out of the discharge ports 60,`such slushing fluid thenpassing down through the passages 44 and 45, and flows around the jaws56. This actionV keeps muck, sand, etc., clear of the jaws and allowsthem to contact `with a` fish to be lifted. j Vhen it is judged that afish has been gripped, the supporting pipes are rotated in a directionto tighten instead of unloosening the couplings, this usually` being arighthanded rotation, and by means of the squared n telescopic member17, rotation is communicated to the 1pipe 25, and by this pipe to thefoot 28, the fiXed collar 29 rotating with the foot on account of ,thesquared connection therewith. The rotating action draws the shoe plug 37upwardly into the socket 35 on account of the screw-threaded connection,thus raising the shoe 40 relative to the sleeve 66,'which sleeve isattached to the collar 31 which is rotatable on the cylindrical section30 of the fooi; and between the foot and the fixed collar 29, on accountof the ball bearings. This upward movement of the shoe plug is continueduntil the lower interior part of the sleeve 66 engages the shanks 48 andthebowed section 49 of the jaws 46, forcing these inwardly and grippingthe fish, as shown in Fig. 5. lVhen firmly gripped, the fish may bedrawn to the surface of the well by elevating the fishing tool in theusual manner. It will be noted that when the jaws are forced inwardly,the valve casing is forced upwardly, but the slushing fluid may still bekforced through the valvev casing if desired.

. In Figs. 8 and 9 I show a modified construction in which a shoe 70,which has an interior screw-threaded connection with the shoe plug 37,is provided with slots 71 in which are mounted the jaws 72 on transversepintles 73. The jaws are provided with cam humps 74 on theouter side andthe inner edges 7 5 provide gripping edges.

- The rod 59 isvprovided'with a cam-shaped In the operation of theconstruction of g Figs. 8 and 9 the fishing tool may be introduced inthe well with the jaws collapsed, the valve casing being in its upperposition and the sleeve 66 also being in an upper position, theshoe plug37 being in its lowermost position in reference to the Socket 35 of thefoot 28. After the tool has reached the bottom of the well and it isdesired to open or spread the jaws apart, theslushing fluid is forcedthrough the fishingtool, driving the valve casing downwardly, whichVaction causes the cam head 7 6 to press downwardly on the fingers 7l,as shown in Fig. 8, and thus tilt the jaws outwardly. Inthis action theslushing iiuid may pass downwardly through the valve casing, keeping thejaws clean.

f When it is desired to grip the fish, the tool is rotated in themanner' above described in connection with Figs. 1 throughl 7, thisforcingthe sleeve 66 downwardly so that its lower edge presses on thecam hump 74and forces the jaws inwardly, as shown in Fig. 9, hold; ingsuch a-ws in an inward position. At the same time the head 7 6 isVforced upwardly,

thereby elevating the valve casing; but. if desired, the slushing fluidmaystill be forced through the valve casing and around the jaws.k

From the above description, together ywith the drawings, itwill be seenthat I have 1de# velope'd a. comprehensive fishing tool which may beintroduced into awell in afcollapsed position, and by meansof theslushing fluid, the jaws may be expanded for gripping a fish whenadjacent the bottom of the well; and that when the supporting pipesarerotated,

thereby rotating most of the structure of the Y fishing tool, the jaws,as they grip the fish, being held stationary, cause a. collapsing orgripping movement of the jaws on the fish,

due to the pressure of the sleeverthrusting downwardly and inwardly onthe back of the jaws. This rotating action may be continued until thefish is firmly grippedk by the jaws and 'then the fish elevated to thetop of the well. Y

Various changes may be made in the prin-V inembersvand retaining saidmembers eeninto KAa'vv'ell ina .contracted position, means operable`from the topot' the well to expand saidjaws when in the well, androtatable means operated frointhe top of the well acting directly on thejaws to forcibly contract maint-ain said jaws, Contracted on a fish if Aiishng tool `leaving a supportnestrueture Witlhvpvotally mountedeXpandble and een-treatable jaws, means yto introduce saol jaws intoawell 'ineontreoteel positon,`hy

draulically operated means for expanding said ,jaws when in thewcll, andnonhydraulic mechanical rotatable means for contracting said'jaivs uponafish- Y Y "fishingtool having va supporting structure with pivotallymounted jaws connected thereto, means to `introduce said jaws into aWellin .a contracted position, means operable from the top of the 'wellfor expandingLsa-id jaws inthe well, a relatively stationl device`,connected to the jaws and a relaj rotatable device connected ,to thesupporting structure, the rotation of the s upporting structureoperating -means for contracting v.the jaws upon ay ish.

6., A fishing` toolV comprising in combina- -tion a string ofsupportingpipes, va telescopic coupling Aconnected thereto, a pipe having afluidchamber below the coupling, afoot connected to said pipeand having.a passagev therethrough, a shoe, means connecting .said

` shoe to the foot, a plurality Lof jaws connected to the shoe, meansyoperable through Vthe said passage in the foot and connected to thejaws to retain said jaws in lcollapsed position for introduction into awell, hydraulic means in the said passagggev to expand the jaws in thewell, rotatable vmeans to shift the shoe relativeto the lfoot, and, -incooperation therewith, means to engage the jaws and forcibly'contractsame on aV iish. l

y7. A fishing-:tool comprising combinaftiona supporting struc-turehav-ing a foot connected thereto witha passage therethrough, a shoe,means forming a threaded connection between the shoe and the foot, ayplurality of jawsfeonnectedto the shoe, means operable in said4,passage and connected to the jaws to :hold :the jaws -,retra cted inklowering into a well, hydraulic,allyy operated means in the pas sage'toexpand the ljaws after 'lowering into va Well, anda sleeve rotatable onthe foot and slielable on the shoe .to engage 4the jews and retract thejaws .on a relative turning movement of the foot and the shoe;

8. A ishing tool comprising in combination a supporting structure, afoot connected thereto, a shoe having a shoe plug, the plug and the foothaving a threaded connection, the shoe plug and 'foot having a passagetherethrough, a plurality of jaws pivotally connected to the shoe, a rodin the said passage and operatively connected to the jaws, a springoperably connected to the rod to retract the jaws for lowering into awell, hydraulicaflly operated means in the passage and connected to therod to expand the jaws, a sleeve rotatable on the toot and slidable onthe shoe to engage the jaws and ycontract them on a turning movementofthe foot relative to the shoe.

9. A fishing tool, as claimed in claim 8, the hydraulically operatedmeans comprising a valve casing having ports at .the upper and lowerends, the lower end of the casing being connected to the rod, a valveplug forming a closure for Vthe upper port, said port being connectedtothe spring. j

10. Aefshing tool having in combination a string of pipe, a telescopiccoupling depending therefrom constructed to transmit turning motion, afoot supported -below said coupling and having a passage therethrough, ashoe having a shoe plug, said plug having a threaded connection with thefoot, a plurality of jaws pivotally connected to the shoe, meansoperable insaid passage and connected to the j aws to maintain the jawscontracted during the lower-ing into a well, hydraulically operatedmea-ns inthe said passage to expand the jaws when lowered in the well,'asleeve mounted on the Jfoot and the slice, said sleeve contracting thejaws on the relative rotation of n the shoe `and the foot. l

ll. In a lishing tool, a supporting structure, a foot lconnected theretohaving a threaded socket at the bottom, a shoe having a threaded shoeplug, said plug threading into the socket, the shoe, shoe plug and foothaving a passage therethrough with a pipe connected to the shoe plugextending through the passage in the foot, a plurality of aws pivotallyconnected to the shoe, a valve casing in the said pipe having aconnection from its lower' end to the jaws, ports in the upper and lowerends of the valve casing, a valve .plug forming a closure for the upperport, a retracting spring connected to the valve plug and to the saidpipe and operable to contract the jaws for lowering into a well, thesaid valve casing being bodily movable downwardly due to downwardpressure of a slushv ing fluid and operable to expand the jaws, andmeans-actuated on the rotation of the foot relative to the sleeve tocontract the jaws.

12. In a fishing tool, as claimedin claim l1, the means to contract theaws comprising a fixed collar on the foot, a rotatable collar loomounted on the foot, ka sleeve connected t0 the rotatable collar, saidsleevek being slidable on the outside of the shoe and engaging-the jawsand contracting the jaws on the rotation ofthe foot relative to theshoe.

13. In a fishing tool, a supporting structurel having a pipe forming acompression fiuid chamber, a foot .connected to the pipe and having athreaded socket, a shoe having a threaded shoe plug fitting in thesocket, a plurality of jaws pivotally connected to the shoe, there beinga passage through the shoe, the shoe plug and the foot, with a smallpipe connected to the shoe plug and extending through the said passagein the foot to the compression fluid chamber, a valve casing slidablyVmounted in the small pipe, a rod connected to the lower end of saidcasing and operatively connected t0 the jaws, ports through the top andbottom of the valve casing, a valve plug for the upper port7 a springconnecting the valve plug and the top of the small pipe, a sleevemounted on the foot and rotatable thereon and slidable over the shoe,said sleeve engaging the jaws and contracting said jaws on the relativerotation of the foot and the shoe.

14. In a fishing tool, as claimed in claim 13, the mounting of thesleeve comprising a. fixed collar on the foot7 a rotatable collar on thefoot, there being antifriction bearingsba tween the fixed and rotatablecollars and the rotatable collar and the foot, the said sleeve beingconnected to the rotatable collar.

. 15. In a fishing tool, as claimed in claim 13, a telescopic couplingconnected to the pipe forming a compression fluid chamber, said couplinghaving an outer member and an inner member, said members having arotation transmitting connection.

In testimony whereof I have signed my name to this specification.

BERTEL M. JENSEN.

